CVE-2025-13558 is a vulnerability classified under CWE-862 (Missing Authorization) found in the Blog2Social: Social Media Auto Post & Scheduler plugin for WordPress, versions up to 8.7.0. The issue arises from the 'deleteUserCcDraftPost' function, which does not perform adequate capability checks before allowing the deletion (trashing) of posts. This missing authorization check permits any authenticated user with at least Subscriber-level privileges to change the status of arbitrary posts to 'trash', effectively deleting them from the site. Since Subscriber-level access is commonly granted to registered users with minimal privileges, this vulnerability significantly lowers the barrier for exploitation. The CVSS 3.1 base score of 5.4 reflects a medium severity, with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), privileges required (PR:L), no user interaction (UI:N), unchanged scope (S:U), no confidentiality impact (C:N), low integrity impact (I:L), and low availability impact (A:L). The vulnerability can lead to unauthorized content removal, impacting the integrity and availability of website data. No patches or exploits are currently known, but the risk remains for sites using affected versions. The vulnerability is particularly relevant for WordPress sites that rely on Blog2Social for social media automation and content scheduling, as attackers could disrupt content workflows or cause denial of service by deleting posts.

For European organizations, this vulnerability poses a risk to the integrity and availability of web content managed via WordPress sites using the Blog2Social plugin. Unauthorized users with Subscriber-level access can delete posts, potentially disrupting marketing campaigns, social media strategies, and content publishing workflows. This could lead to reputational damage, loss of customer engagement, and operational downtime. Organizations with multiple users having Subscriber or higher roles are more vulnerable, as the attack surface is larger. The impact is especially critical for businesses relying heavily on digital content and social media presence, such as media companies, e-commerce platforms, and public sector websites. Although confidentiality is not directly impacted, the loss or alteration of content can indirectly affect trust and compliance with data integrity standards. The absence of known exploits reduces immediate risk but does not eliminate the threat, as attackers could develop exploits given the public disclosure.

1. Monitor for plugin updates from the vendor and apply patches promptly once available to fix the missing authorization check. 2. Until a patch is released, restrict Subscriber-level user capabilities by customizing roles and permissions to prevent access to functions related to post deletion. 3. Implement WordPress security plugins that log and alert on post status changes, enabling rapid detection of unauthorized deletions. 4. Limit the number of users assigned Subscriber or higher roles and enforce strict user account management policies. 5. Conduct regular audits of user roles and permissions to ensure least privilege principles are maintained. 6. Consider temporarily disabling or replacing the Blog2Social plugin if the risk is unacceptable and no immediate patch is available. 7. Employ web application firewalls (WAFs) with rules to detect and block suspicious requests targeting post deletion endpoints. 8. Educate site administrators and content managers about the vulnerability and encourage vigilance for unusual activity.